Display panel and driving method, display device

Abstract

A display panel and a driving method thereof, and a display device, the display panel comprising a display liquid crystal cell and a mode switching liquid crystal cell; the mode switching liquid crystal cell comprising a first substrate, a second substrate and a first liquid crystal layer, the first substrate being provided with a first field-of-view control electrode and a touch electrode, the second substrate being provided with a second field-of-view control electrode matched with the first field-of-view control electrode, the first substrate being provided with a refractive layer, the side of the refractive layer facing the first liquid crystal layer being provided with a plurality of protruding structures; the display liquid crystal cell having first pixel units and second pixel units arranged alternately, each protruding structure corresponding to at least one first pixel unit and one second pixel unit. The mode switching liquid crystal cell for controlling switching between 2D display mode and 3D display mode is matched with the display liquid crystal cell, so as to realize switching between 2D display function and 3D display function; the touch electrode with touch function is integrated on the first substrate of the mode switching liquid crystal cell, so as to reduce the cell thickness of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel, driving method, and display device. Background Technology

[0002] Liquid crystal display (LCD) panels boast advantages such as high image quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, making them dominant in the flat panel display field. With the rapid development of display technology, LCD panels have become widely accepted and used, appearing in devices such as smartphones and tablets. One solution is to integrate the touch panel and LCD panel using embedded touch technology, embedding the touch panel functionality within the LCD panel. This allows the LCD panel to simultaneously display and sense touch input.

[0003] Depending on how the touch sensing layer is positioned within the display panel, display panels are categorized into add-on, in-cell, and on-cell structures. In-cell touchscreens integrate touch functionality into the display, effectively reducing the overall thickness of the display and simplifying manufacturing processes, resulting in thinner, lighter products with lower production costs, making them widely popular. On the other hand, on-cell touchscreens place the touch functionality on the side of the LCD panel closer to the external environment, closer to the user's finger, resulting in better touch performance. However, this increases the thickness of the LCD panel. Furthermore, because the upper substrate of the LCD panel has an electrode layer covering its entire surface, applying electrical signals to this layer can easily interfere with the signals on the touch electrodes, causing touch functionality to fail.

[0004] Existing LCD panels typically only have 2D (flat) display functionality, and a small number of LCD panels typically only have 3D (stereoscopic) display functionality, but they cannot switch between 2D and 3D display functions, resulting in a poor user experience. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the prior art, the present invention aims to provide a display panel and driving method, and a display device, so as to solve at least one of the problems in the prior art.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] This invention provides a display panel, including a display liquid crystal cell and a mode switching liquid crystal cell stacked on the light-emitting side of the display liquid crystal cell. The display liquid crystal cell is used to control the grayscale display of the image, and the mode switching liquid crystal cell is used to control the switching between 2D display mode and 3D display mode.

[0008] The mode switching liquid crystal cell includes a first substrate, a second substrate disposed opposite to the first substrate, and a first liquid crystal layer disposed between the first substrate and the second substrate. The first substrate is provided with a first field-of-view control electrode and a touch electrode with touch function. The second substrate is provided with a second field-of-view control electrode cooperating with the first field-of-view control electrode on the side facing the first liquid crystal layer. The first substrate is provided with a refractive layer on the side facing the first liquid crystal layer, and the refractive layer is provided with a plurality of protrusion structures on the side facing the first liquid crystal layer.

[0009] The display liquid crystal cell has alternating first pixel units and second pixel units, and each of the protrusion structures corresponds to at least one first pixel unit and one second pixel unit.

[0010] Furthermore, the touch electrode includes a first touch electrode strip and a second touch electrode strip arranged in a cross manner, wherein the first touch electrode strip and the second touch electrode strip are located in different layers and are insulated from each other.

[0011] Furthermore, the touch electrode is disposed between the first substrate and the first field-of-view control electrode, the refractive layer is disposed on the side of the first field-of-view control electrode facing the first liquid crystal layer, and the first field-of-view control electrode has an opening corresponding to the touch electrode.

[0012] Furthermore, the touch electrode is disposed between the first substrate and the refractive layer, and the first field-of-view control electrode is disposed on the side of the refractive layer facing the first liquid crystal layer;

[0013] The first field-of-view control electrode has an opening corresponding to the touch electrode, or the first field-of-view control electrode is a planar electrode.

[0014] Furthermore, the touch electrode includes a first spacer electrode strip and a second spacer electrode strip arranged in a cross manner, with the first spacer electrode strip between two adjacent first touch electrode strips and the second spacer electrode strip between two adjacent second touch electrode strips.

[0015] Furthermore, the touch electrode includes a first touch electrode strip and a second touch electrode strip arranged intersecting each other. The first touch electrode strip and the second touch electrode strip are located on the same layer and are insulated from each other. The first touch electrode strip has a bridging electrode at the intersection with the second touch electrode strip. The bridging electrode and the second touch electrode strip are located on different layers.

[0016] Alternatively, the touch electrode includes multiple touch electrode blocks and multiple touch traces, with each touch electrode block connected to the touch chip via a corresponding touch trace;

[0017] Alternatively, the touch electrode may be reused as the first field-of-view control electrode.

[0018] Furthermore, the first substrate is provided with a wire, and a conductive post is provided between the first substrate and the second substrate. The conductive post is located in the non-display area at the edge. One end of the conductive post is electrically connected to the second field control electrode, and the other end of the conductive post is electrically connected to one end of the wire. The other end of the wire extends to the bonding area on the first substrate.

[0019] This application also provides a driving method for a display panel, used to drive the display panel as described above, the driving method comprising:

[0020] In 2D display mode, the refractive index of the first liquid crystal layer is controlled to be equal to the refractive index of the refractive layer, and the first pixel unit and the second pixel unit on the display liquid crystal cell display the same image;

[0021] In 3D display mode, the refractive index of the first liquid crystal layer is controlled to be less than the refractive index of the refractive layer. The first pixel unit on the display liquid crystal cell displays a first-view image, and the second pixel unit displays a second-view image. The first-view image and the second-view image together form a 3D display image.

[0022] Furthermore, the driving method includes:

[0023] In dual-view display mode, the refractive index of the first liquid crystal layer is controlled to be less than the refractive index of the refractive layer. The first pixel unit on the display liquid crystal cell displays a first-view image, and the second pixel unit displays a second-view image. The first-view image and the second-view image are different display images.

[0024] Alternatively, in single-view display mode, the refractive index of the first liquid crystal layer is controlled to be less than the refractive index of the refractive layer, the first pixel unit on the display liquid crystal cell displays a first viewing angle image, and the second pixel unit is turned off; or, in single-view display mode, the refractive index of the first liquid crystal layer is controlled to be less than the refractive index of the refractive layer, the first pixel unit on the display liquid crystal cell is turned off, and the second pixel unit displays a second viewing angle image.

[0025] This application also provides a display device, including the display panel described above.

[0026] The beneficial effects of this invention are as follows: by cooperating with the mode switching liquid crystal cell used to control the switching between 2D display mode and 3D display mode, the switching between 2D display function and 3D display function can be realized, thereby enhancing product competitiveness; moreover, by integrating the touch electrode with touch function on the first substrate of the mode switching liquid crystal cell, the thickness of the display panel can be reduced, which is more conducive to the development of thinner and lighter designs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the display device in its initial state according to Embodiment 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 1 of the present invention;

[0029] Figure 3 This is a schematic diagram of the planar structure of the first touch electrode strip in Embodiment 1 of the present invention;

[0030] Figure 4 This is a schematic diagram of the planar structure of the second touch electrode strip in Embodiment 1 of the present invention;

[0031] Figure 5 This is a schematic diagram of the planar structure of the first field-of-view control electrode in Embodiment 1 of the present invention;

[0032] Figure 6 This is a schematic diagram of the planar structure of the display liquid crystal cell in Embodiment 1 of the present invention;

[0033] Figure 7 This is a schematic diagram of the display device in 3D display mode according to Embodiment 1 of the present invention;

[0034] Figure 8 yes Figure 7 A schematic diagram illustrating the principle of the display device in 3D display mode;

[0035] Figure 9 This is a schematic diagram of the display device in 2D display mode according to Embodiment 1 of the present invention;

[0036] Figure 10 yes Figure 9 A schematic diagram of the display device in 2D display mode;

[0037] Figure 11 This is a schematic diagram of the display panel in its initial state according to Embodiment 2 of the present invention;

[0038] Figure 12 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 2 of the present invention;

[0039] Figure 13This is one of the structural schematic diagrams of the display panel in its initial state in Embodiment 3 of the present invention;

[0040] Figure 14 This is the second schematic diagram of the display panel in its initial state in Embodiment 3 of the present invention;

[0041] Figure 15 This is a schematic diagram of the display panel in its initial state according to Embodiment 4 of the present invention;

[0042] Figure 16 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 4 of the present invention;

[0043] Figure 17 This is a schematic diagram of the planar structure of the first touch electrode strip in Embodiment 4 of the present invention;

[0044] Figure 18 This is a schematic diagram of the planar structure of the second touch electrode strip in Embodiment 4 of the present invention;

[0045] Figure 19 This is a schematic diagram of the display panel in its initial state according to Embodiment 5 of the present invention;

[0046] Figure 20 This is a schematic diagram of the display panel in its initial state according to Embodiment Six of the present invention;

[0047] Figure 21 This is a schematic diagram of the display panel in its initial state according to Embodiment 7 of the present invention;

[0048] Figure 22 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 7 of the present invention;

[0049] Figure 23 This is a schematic diagram of the display panel in its initial state according to Embodiment 8 of the present invention;

[0050] Figure 24 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 8 of the present invention. Detailed Implementation

[0051] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, provides a detailed explanation of the specific implementation methods, structures, features, and effects of the display panel and driving method, and display device proposed according to the present invention:

[0052] [Example 1]

[0053] Figure 1 This is a schematic diagram of the display device in its initial state according to Embodiment 1 of the present invention. Figure 2 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of the planar structure of the first touch electrode strip in Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of the planar structure of the second touch electrode strip in Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the planar structure of the first field-of-view control electrode in Embodiment 1 of the present invention. Figure 6 This is a schematic diagram of the planar structure of the display liquid crystal cell in Embodiment 1 of the present invention.

[0054] like Figures 1 to 6 As shown, a display panel provided in Embodiment 1 of the present invention includes a display liquid crystal cell 30 and a mode switching liquid crystal cell 10 stacked on the light-emitting side of the display liquid crystal cell 30, that is, the mode switching liquid crystal cell 10 is disposed on the side of the display liquid crystal cell 30 closer to the external environment. The display liquid crystal cell 30 is used to control the grayscale display of the image, and the mode switching liquid crystal cell 10 is used to control the switching between 2D display mode and 3D display mode.

[0055] The mode-switching liquid crystal cell 10 includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a first liquid crystal layer 13 disposed between the first substrate 11 and the second substrate 12. The first substrate 11 has a first field-of-view control electrode 111 and a touch electrode with touch functionality. The second substrate 12 has a second field-of-view control electrode 121 cooperating with the first field-of-view control electrode 111 on the side facing the first liquid crystal layer 13. The first substrate 11 has a refractive layer 112 on the side facing the first liquid crystal layer 13, and the refractive layer 112 has multiple protrusion structures on the side facing the first liquid crystal layer 13.

[0056] In this embodiment, the first liquid crystal layer 13 uses positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. The refractive index ne of the positive liquid crystal molecules is 1.7, and no is 1.5. In the initial state, the positive liquid crystal molecules in the first liquid crystal layer 13 are aligned parallel to the first substrate 11 and the second substrate 12. The alignment directions of the positive liquid crystal molecules closer to the first substrate 11 and the positive liquid crystal molecules closer to the second substrate 12 are parallel or antiparallel. The refractive index of the refractive layer 112 is equal to the refractive index ne of the positive liquid crystal molecules. Of course, in other embodiments, the first liquid crystal layer 13 can also use negative liquid crystal molecules, with a refractive index ne of 1.5 and no of 1.7. The refractive index of the refractive layer 112 needs to be equal to the refractive index no of the negative liquid crystal molecules to enable switching between 2D and 3D display modes.

[0057] It's important to note that light undergoes birefringence when propagating in a liquid crystal; the anisotropy of the refractive index exhibits birefringence. For uniaxial crystals, there are two different definitions of refractive index: no and ne. no refers to the refractive index of ordinary ray (where the photoelectric vector vibration direction is perpendicular to the crystal's optical axis), hence the abbreviation "no." Ordinary ray refers to light whose electric field component (photoelectric vector vibration direction) is perpendicular to the crystal's optical axis. ne refers to the refractive index of extraordinary ray (where the photoelectric vector vibration direction is parallel to the crystal's optical axis), hence the abbreviation "ne." Extraordinary ray refers to light whose electric field component (photoelectric vector vibration direction) is parallel to the crystal's optical axis.

[0058] The display liquid crystal cell 30 has alternating first pixel units P1 and second pixel units P2, with each protruding structure corresponding to at least one first pixel unit P1 and one second pixel unit P2. The first liquid crystal layer 13 is deflected by the first field-of-view control electrode 111 and the second field-of-view control electrode 121. Utilizing the birefringence of the liquid crystal molecules in the first liquid crystal layer 13, the refraction direction of light passing through the first liquid crystal layer 13 and the refractive layer 112 can be changed, thereby altering the viewing angle. This, combined with the display of corresponding patterns by the first pixel units P1 and the second pixel units P2, enables switching between 2D and 3D display modes.

[0059] like Figure 6 As shown, in this embodiment, a column of first pixel units P1 and a column of second pixel units P2 are arranged alternately along the row direction. The raised structure is a strip-shaped structure extending along the column direction. Each raised structure corresponds to a column of first pixel units P1 and a column of second pixel units P2. The central axis of the raised structure is aligned with the center line between adjacent first pixel units P1 and second pixel units P2, thereby making the viewing angle of the display panel more symmetrical and the display effect better. The raised structure can be a semi-cylinder, or it can be a hemisphere.

[0060] like Figures 1 to 4As shown, the touch electrode includes a first touch electrode strip 211 and a second touch electrode strip 221 arranged in a cross configuration. The first touch electrode strip 211 and the second touch electrode strip 221 are located on different layers and are insulated from each other. One of the first touch electrode strip 211 and the second touch electrode strip 221 is a touch driving electrode, and the other is a touch sensing electrode, thereby realizing capacitive touch. In this embodiment, the touch electrode is disposed between the first substrate 11 and the first field-of-view control electrode 111. The refractive layer 112 is disposed on the side of the first field-of-view control electrode 111 facing the first liquid crystal layer 13. The first field-of-view control electrode 111 has an opening 111a corresponding to the touch electrode, that is, the first field-of-view control electrode 111 is hollowed out in the area corresponding to the touch electrode. By providing the opening 111a corresponding to the touch electrode on the first field-of-view control electrode 111, the capacitance value between different signals can be minimized to reduce the interference of the first field-of-view control electrode 111 on the touch signal on the touch electrode. An insulating layer is provided between the first touch electrode strip 211 and the second touch electrode strip 221, and between the second touch electrode strip 221 and the first field of view control electrode 111, thereby insulatingly separating the first touch electrode strip 211 and the second touch electrode strip 221, and insulatingly separating the second touch electrode strip 221 and the first field of view control electrode 111.

[0061] Furthermore, the touch electrodes include first spacer electrode strips 212 and second spacer electrode strips 222 arranged in a crisscross pattern. A first spacer electrode strip 212 is provided between two adjacent first touch electrode strips 211, and the two adjacent first touch electrode strips 211 are insulated from each other by the first spacer electrode strip 212. A second spacer electrode strip 222 is provided between two adjacent second touch electrode strips 221, and the two adjacent second touch electrode strips 221 are insulated from each other by the second spacer electrode strip 222. By providing the first spacer electrode strip 212 and the second spacer electrode strip 222, the problem of short circuits between two adjacent first touch electrode strips 211 and between two adjacent second touch electrode strips 221 can be reduced.

[0062] In this embodiment, the first touch electrode strip 211 and the first spacer electrode strip 212 are located on the same layer and are etched from the same metal thin film. Similarly, the second touch electrode strip 221 and the second spacer electrode strip 222 are located on the same layer and are etched from the same metal thin film. All three elements—the first touch electrode strip 211, the first spacer electrode strip 212, the second touch electrode strip 221, and the second spacer electrode strip 222—are made of materials with good conductivity, such as metals like copper (Cu), silver (Ag), chromium (Cr), molybdenum (Mo), aluminum (Al), titanium (Ti), manganese (Mn), and nickel (Ni), or combinations of these metals such as Al / Mo or Cu / Mo. All three elements—the first touch electrode strip 211, the first spacer electrode strip 212, the second touch electrode strip 221, and the second spacer electrode strip 222—have a mesh structure, thereby ensuring light transmittance and reducing reflection of ambient light, facilitating viewing of the display image in brighter environments. Figure 5 As shown, the opening 111a on the first field-of-view control electrode 111 is also a grid structure. To ensure the continuity of the first field-of-view control electrode 111, the opening 111a adopts a non-closed grid structure, that is, each grid has a gap, thereby connecting the entire first field-of-view control electrode 111 together. Of course, the independent small block electrodes of the grid can also be connected to each other by bridging wires.

[0063] Furthermore, such as Figure 1 and Figure 5 As shown, a conductive line 113 is provided on the first substrate 11, and a conductive post 14 is provided between the first substrate 11 and the second substrate 12. The conductive post 14 is located in the non-display area at the edge. One end of the conductive post 14 is electrically connected to the second field-of-view control electrode 121, and the other end of the conductive post 14 is electrically connected to one end of the conductive line 113. The other end of the conductive line 113 extends to the bonding area on the first substrate 11. The conductive post 14 can be conductive silver paste or a gold ball. Electrical signals are transmitted to the second field-of-view control electrode 121 through the conductive line 113 and the conductive post 14. Therefore, only the bonding area needs to be provided on the first substrate 11; the second substrate 12 does not need to have a bonding area. The conductive line 113 can be etched using the same transparent conductive layer as the first field-of-view control electrode 111, such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0064] The display liquid crystal cell 30 includes a color filter substrate 31, an array substrate 32 disposed opposite to the color filter substrate 31, and a second liquid crystal layer 33 disposed between the color filter substrate 31 and the array substrate 32. The second liquid crystal layer 33 preferably uses positive liquid crystal molecules, i.e., liquid crystal molecules with positive dielectric anisotropy. Initially, the positive liquid crystal molecules in the second liquid crystal layer 33 are aligned parallel to the color filter substrate 31 and the array substrate 32, with the alignment direction of the positive liquid crystal molecules closer to the color filter substrate 31 being parallel or antiparallel to the alignment direction of the positive liquid crystal molecules closer to the array substrate 32. Of course, in other embodiments, the second liquid crystal layer 33 can also use negative liquid crystal molecules, and the negative liquid crystal molecules in the second liquid crystal layer 33 can be aligned perpendicular to the color filter substrate 31 and the array substrate 32, i.e., similar to the alignment method of the VA display mode.

[0065] Furthermore, a first polarizer 41 is provided between the mode switching liquid crystal cell 10 and the display liquid crystal cell 30, and a second polarizer 42 is provided on the side of the display liquid crystal cell 30 away from the mode switching liquid crystal cell 10. The light transmission axis of the first polarizer 41 is perpendicular to the light transmission axis of the second polarizer 42.

[0066] The color filter substrate 31 has color resist layers 312 arranged in an array and black matrices 311 separating the color resist layers 312. The color resist layers 312 include red (R), green (G), and blue (B) color resist materials, and correspondingly form red (R), green (G), and blue (B) sub-pixels. The first pixel unit P1 and the second pixel unit P2 both have red (R), green (G), and blue (B) sub-pixels, for example, as shown... Figure 6 As shown, the first pixel unit P1 of the first column is red, the second pixel unit P2 of the second column is red, the first pixel unit P1 of the third column is green, the second pixel unit P2 of the fourth column is green, the first pixel unit P1 of the fifth column is blue, and the second pixel unit P2 of the sixth column is blue. That is, the pixel units are arranged in an RRGGBB pattern. Of course, other arrangement methods can also be used.

[0067] The array substrate 32 has multiple pixel units defined by multiple scan lines (not shown) and multiple data lines (not shown) that are mutually insulated and intersecting on the side facing the second liquid crystal layer 33. Each pixel unit has a pixel electrode 322 and a thin-film transistor (not shown). The pixel electrode 322 is electrically connected to the data line of the adjacent thin-film transistor through the thin-film transistor. The thin-film transistor includes a gate, an active layer, a drain, and a source. The gate and the scan lines are located on the same layer and are electrically connected. The gate and the active layer are isolated by an insulating layer. The source is electrically connected to the data line, and the drain is electrically connected to the pixel electrode 322 through a contact hole.

[0068] like Figure 1As shown, in this embodiment, a common electrode 321 is further provided on the side of the array substrate 32 facing the second liquid crystal layer 33. The common electrode 321 and the pixel electrode 322 are located on different layers and are insulated from each other by an insulating layer. The common electrode 321 can be located above or below the pixel electrode 322. Figure 1 The diagram shows the common electrode 321 located below the pixel electrode 322. Preferably, the common electrode 321 is a planar electrode disposed across the entire surface, and the pixel electrode 322 is a block electrode disposed within each pixel unit or a slit electrode with multiple electrode strips, to form a fringe field switching (FFS) mode. Of course, in other embodiments, the pixel electrode 322 and the common electrode 321 may be located on the same layer, but they are insulated from each other. Each of the pixel electrode 322 and the common electrode 321 may include multiple electrode strips, and the electrode strips of the pixel electrode 322 and the common electrode 321 are arranged alternately to form an in-plane switching (IPS) mode; or, in other embodiments, the array substrate 32 has a pixel electrode 322 on the side facing the second liquid crystal layer 33, and the color filter substrate 31 has a common electrode 321 on the side facing the second liquid crystal layer 33 to form a TN mode or a VA mode.

[0069] The first substrate 11, the second substrate 12, the color filter substrate 31, and the array substrate 32 can be made of materials such as glass, acrylic, and polycarbonate. The first field-of-view control electrode 111, the second field-of-view control electrode 121, the common electrode 321, and the pixel electrode 322 can be made of materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0070] like Figure 1 As shown, in this embodiment, a display device is also provided, including a display panel as described above and a backlight module 50. The backlight module 50 is disposed below the display panel and is used to provide a backlight source for the display panel.

[0071] The backlight module 50 includes a backlight source 51 and a privacy layer 53, which reduces the range of light emission angles. A brightness enhancement film 52 is also provided between the backlight source 51 and the privacy layer 53, increasing the brightness of the backlight module 50. The privacy layer 53 acts like a miniature venetian blind, blocking light with a large incident angle while allowing light with a smaller incident angle to pass through, thus reducing the range of light angles passing through the privacy layer 53. The privacy layer 53 includes multiple parallel light-blocking walls and light-transmitting holes located between adjacent light-blocking walls. Light-absorbing material is provided on both sides of the light-blocking walls. Alternatively, the backlight source 51 can be a light-collecting backlight, eliminating the need for a privacy layer 53; however, light-collecting backlights are more expensive than conventional backlights.

[0072] The backlight module 50 can be an edge-lit backlight module or a direct-lit backlight module. Preferably, the backlight module 50 adopts a collimated backlight (CBL) mode, which can collect light and ensure display effect.

[0073] This embodiment also provides a driving method for a display panel, used to drive the display panel as described above, the driving method comprising:

[0074] Figure 7 This is a schematic diagram of the display device in 3D display mode according to Embodiment 1 of the present invention. Figure 8 yes Figure 7 A schematic diagram illustrating the principle of the display device in 3D display mode. (See diagram for example.) Figure 7 and Figure 8 As shown, in 3D display mode, no voltage signal is applied to either the first field-of-view control electrode 111 or the second field-of-view control electrode 121, resulting in no perpendicular electric field between them. The positive liquid crystal molecules in the first liquid crystal layer 13 remain in their initial flat state. At this time, the refractive index of the positive liquid crystal molecules is no, ensuring that the refractive index of the first liquid crystal layer 13 is less than that of the refractive index of the refractive layer 112. Light passing through the first liquid crystal layer 13 and the refractive layer 112 will be refracted, changing the light emission angle. The first pixel unit P1 on the display liquid crystal cell 30 displays the first viewing angle image, and the second pixel unit P2 displays the second viewing angle image. The first and second viewing angle images together form the 3D display image. Therefore, when viewed from different directions, images from different perspectives can be seen, presenting a stereoscopic effect.

[0075] Figure 9 This is a schematic diagram of the display device in 2D display mode according to Embodiment 1 of the present invention. Figure 10 yes Figure 9 A schematic diagram illustrating the principle of the display device in 2D display mode. (See diagram for example.) Figure 9 and Figure 10 As shown, in 2D display mode, corresponding voltage signals are applied to the first field-of-view control electrode 111 and the second field-of-view control electrode 121, creating a strong vertical electric field between them. This causes the positive liquid crystal molecules in the first liquid crystal layer 13 to deflect vertically. At this point, the refractive index of the positive liquid crystal molecules is ne, thus controlling the refractive index of the first liquid crystal layer 13 to be equal to the refractive index of the refractive layer 112. Light passing through the first liquid crystal layer 13 and the refractive layer 112 will not be refracted. The first pixel unit P1 and the second pixel unit P2 on the display liquid crystal cell 30 display the same image, thus providing the same 2D image regardless of whether viewed from the front or at an angle.

[0076] Furthermore, the driving method includes: in the dual-field-of-view display mode, no voltage signal is applied to either the first field-of-view control electrode 111 or the second field-of-view control electrode 121, so that there is no perpendicular electric field between the first field-of-view control electrode 111 and the second field-of-view control electrode 121. The positive liquid crystal molecules in the first liquid crystal layer 13 remain in their initial flat state. At this time, the refractive index of the positive liquid crystal molecules is no, so as to control the refractive index of the first liquid crystal layer 13 to be less than the refractive index of the refractive layer 112. Light passing through the first liquid crystal layer 13 and the refractive layer 112 will be refracted to change the light emission angle. The first pixel unit P1 on the display liquid crystal cell 30 displays the first viewing angle image, and the second pixel unit P2 displays the second viewing angle image. The first viewing angle image and the second viewing angle image are different display images, that is, the first viewing angle image and the second viewing angle image are different 2D images. Therefore, different 2D images can be seen from the first viewing angle and the second viewing angle direction. This can be applied to car displays to facilitate the driver and passenger seats to view different images respectively.

[0077] Furthermore, the driving method includes: in single-field display mode, no voltage signal is applied to either the first field-of-view control electrode 111 or the second field-of-view control electrode 121, so that there is no perpendicular electric field between the first field-of-view control electrode 111 and the second field-of-view control electrode 121. The positive liquid crystal molecules in the first liquid crystal layer 13 remain in their initial flat state. At this time, the refractive index of the positive liquid crystal molecules is no, so as to control the refractive index of the first liquid crystal layer 13 to be less than the refractive index of the refractive layer 112. Light passing through the first liquid crystal layer 13 and the refractive layer 112 will be refracted to change the light emission angle. The first pixel unit P1 on the display liquid crystal cell 30 displays the first viewing angle image, and the second pixel unit P2 is turned off, that is, it does not display an image, so that the displayed image can only be seen from the direction of the first viewing angle; or the first pixel unit P1 is turned off, that is, it does not display an image, and the second pixel unit P2 displays the second viewing angle image, so that the displayed image can only be seen from the direction of the second viewing angle.

[0078] [Example 2]

[0079] Figure 11 This is a schematic diagram of the display panel in its initial state in Embodiment 2 of the present invention. Figure 12 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 2 of the present invention. Figure 11 and Figure 12 As shown, the display panel and driving method, and display device provided in Embodiment 2 of the present invention are similar to those in Embodiment 1. Figures 1 to 10 The display panel, driving method, and display device are basically the same as those in the previous embodiment, except that in this embodiment:

[0080] The touch electrode is located on the side of the first substrate 11 away from the first liquid crystal layer 13, thereby bringing the touch electrode closer to the external environment to enhance the touch effect and reduce the influence of the first field-of-view control electrode 111 on the touch signal on the touch electrode. Both the first field-of-view control electrode 111 and the refractive layer 112 are located on the side of the first substrate 11 facing the first liquid crystal layer 13, with the first field-of-view control electrode 111 positioned between the first substrate 11 and the refractive layer 112. Because the touch electrode is located on the side of the first substrate 11 away from the first liquid crystal layer 13, the influence of the first field-of-view control electrode 111 on the touch signal on the touch electrode is relatively small. Therefore, the first field-of-view control electrode 111 does not need to have an opening 111a corresponding to the touch electrode; that is, the first field-of-view control electrode 111 adopts a planar structure.

[0081] Furthermore, the bonding region is also located on the side of the first substrate 11 away from the first liquid crystal layer 13. The wire 113 transmits the signal from the bonding region to the first field-of-view control electrode 111 and the second field-of-view control electrode 121 through a side-wiring process. That is, in this embodiment, the wire 113 not only transmits signals to the first field-of-view control electrode 111, but also needs to transmit signals to the second field-of-view control electrode 121.

[0082] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0083] [Example 3]

[0084] Figure 13 This is one of the structural schematic diagrams of the display panel in its initial state in Embodiment 3 of the present invention. Figure 14 This is the second schematic diagram of the display panel in its initial state in Embodiment 3 of the present invention. Figure 13 and Figure 14 As shown, the display panel and driving method, and display device provided in Embodiment 3 of the present invention are similar to those in Embodiment 1. Figures 1 to 10 Example 2 Figures 11 to 12 The display panel, driving method, and display device are basically the same as those in the previous embodiment, except that in this embodiment:

[0085] The touch electrode is disposed between the first substrate 11 and the refractive layer 112, and the first field-of-view control electrode 111 is disposed on the side of the refractive layer 112 facing the first liquid crystal layer 13, thereby making the first field-of-view control electrode 111 further away from the touch electrode. Because the refractive layer 112 is present between the first field-of-view control electrode 111 and the touch electrode, the influence of the first field-of-view control electrode 111 on the touch signal on the touch electrode is further reduced. Therefore, as... Figure 14As shown, the first field-of-view control electrode 111 is a planar electrode, meaning that the first field-of-view control electrode 111 does not need to have an opening 111a corresponding to the touch electrode. Of course, to further reduce the influence of the first field-of-view control electrode 111 on the touch signal on the touch electrode, such as... Figure 13 As shown, the first field-of-view control electrode 111 may also be provided with an opening 111a corresponding to the touch electrode.

[0086] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be repeated here.

[0087] [Example 4]

[0088] Figure 15 This is a schematic diagram of the display panel in its initial state in Embodiment 4 of the present invention. Figure 16 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 4 of the present invention. Figure 17 This is a schematic diagram of the planar structure of the first touch electrode strip in Embodiment 4 of the present invention. Figure 18 This is a schematic diagram of the planar structure of the second touch electrode strip in Embodiment 4 of the present invention. Figures 15 to 18 As shown, the display panel and driving method, and display device provided in Embodiment 4 of the present invention are similar to those in Embodiment 1. Figures 1 to 10 The display panel, driving method, and display device are basically the same as those in the previous embodiment, except that in this embodiment:

[0089] The touch electrode is reused as the first field-of-view control electrode 111, meaning that the first field-of-view control electrode 111 and the touch electrode share the same electrode, thereby reducing the cell thickness and manufacturing process. Because the first field-of-view control electrode 111 and the touch electrode share the same electrode, the driving method requires time-sharing control of the 2D display mode and 3D display mode switching function and the touch function, and they cannot be controlled simultaneously.

[0090] Furthermore, such as Figures 16 to 18 As shown, in order to enhance the driving effect of the touch electrode multiplexing as the first field-of-view control electrode 111, the first spacing electrode strip 212 and the second spacing electrode strip 222 also need to be supplied with control signals for switching display modes, i.e., they need to be connected to the bonding area via leads. It is understood that the first spacing electrode strip 212 and the second spacing electrode strip 222 are only used to supply control signals for switching display modes; no touch signals need to be supplied during the touch period.

[0091] This embodiment also provides a driving method for a display panel, used to drive the display panel as described above, the driving method comprising:

[0092] In 3D display mode, no voltage signal is applied to either the touch electrode or the second field-of-view control electrode 121, resulting in no perpendicular electric field between them. The positive liquid crystal molecules in the first liquid crystal layer 13 remain in their initial flat state, at which point the refractive index of the positive liquid crystal molecules is no, thus controlling the refractive index of the first liquid crystal layer 13 to be less than that of the refractive index of the refractive layer 112. Light passing through the first liquid crystal layer 13 and the refractive layer 112 will be refracted, changing the angle at which the light exits. The first pixel unit P1 on the display liquid crystal cell 30 displays the first viewing angle image, and the second pixel unit P2 displays the second viewing angle image. The first and second viewing angle images together form the 3D display image. Therefore, when viewed from different directions, different viewing angle images can be seen, presenting a stereoscopic effect.

[0093] Figure 9 This is a schematic diagram of the display device in 2D display mode according to Embodiment 1 of the present invention. Figure 10 yes Figure 9 A schematic diagram illustrating the principle of the display device in 2D display mode. (See diagram for example.) Figure 9 and Figure 10 As shown, in 2D display mode, a corresponding voltage signal is applied to the touch electrode and the second field-of-view control electrode 121, creating a strong vertical electric field between them. This causes the positive liquid crystal molecules in the first liquid crystal layer 13 to deflect vertically. At this point, the refractive index of the positive liquid crystal molecules is ne, thus controlling the refractive index of the first liquid crystal layer 13 to be equal to the refractive index of the refractive layer 112. Light passing through the first liquid crystal layer 13 and the refractive layer 112 will not be refracted. The first pixel unit P1 and the second pixel unit P2 on the display liquid crystal cell 30 display the same image, allowing the same 2D image to be seen regardless of whether it is viewed from the front or at an angle.

[0094] Furthermore, the driving method includes: in the dual-field-of-view display mode, no voltage signal is applied to either the touch electrode or the second field-of-view control electrode 121, so that there is no vertical electric field between the touch electrode and the second field-of-view control electrode 121. The positive liquid crystal molecules in the first liquid crystal layer 13 remain in their initial flat state. At this time, the refractive index of the positive liquid crystal molecules is no, so as to control the refractive index of the first liquid crystal layer 13 to be less than the refractive index of the refractive layer 112. Light passing through the first liquid crystal layer 13 and the refractive layer 112 will be refracted to change the light emission angle. The first pixel unit P1 on the display liquid crystal cell 30 displays the first viewing angle image, and the second pixel unit P2 displays the second viewing angle image. The first viewing angle image and the second viewing angle image are different display images, that is, the first viewing angle image and the second viewing angle image are different 2D images. Therefore, different 2D images can be seen from the first viewing angle and the second viewing angle direction. This can be applied to car displays to facilitate the driver and passenger seats to view different images respectively.

[0095] Furthermore, the driving method includes: in single-field display mode, no voltage signal is applied to either the touch electrode or the second field-of-view control electrode 121, so that there is no vertical electric field between the touch electrode and the second field-of-view control electrode 121. The positive liquid crystal molecules in the first liquid crystal layer 13 remain in their initial flat state. At this time, the refractive index of the positive liquid crystal molecules is no, so as to control the refractive index of the first liquid crystal layer 13 to be less than the refractive index of the refractive layer 112. Light passing through the first liquid crystal layer 13 and the refractive layer 112 will be refracted to change the light emission angle. The first pixel unit P1 on the display liquid crystal cell 30 displays the first viewing angle image, and the second pixel unit P2 is turned off, that is, it does not display an image, so that the displayed image can only be seen from the direction of the first viewing angle; or the first pixel unit P1 is turned off, that is, it does not display an image, and the second pixel unit P2 displays the second viewing angle image, so that the displayed image can only be seen from the direction of the second viewing angle.

[0096] During the touch control period, no voltage signal is applied to the second field of view control electrode 121, and the corresponding touch signal is applied to the touch electrode to realize the touch function.

[0097] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0098] [Example 5]

[0099] Figure 19 This is a schematic diagram of the display panel in its initial state according to Embodiment 5 of the present invention. Figure 19 As shown, the display panel and driving method, and display device provided in Embodiment 5 of the present invention are similar to those in Embodiment 3. Figures 13 to 14 Example 4 Figures 15 to 18 The display panel, driving method, and display device are basically the same as those in the previous embodiment, except that in this embodiment:

[0100] Since the touch electrode is reused as the first field-of-view control electrode 111, or the first field-of-view control electrode 111 is disposed on the side of the refractive layer 112 facing the first liquid crystal layer 13, the refractive layer 112 can serve as an insulating layer covering the second touch electrode strip 221, thereby reducing the number of insulating layers in the first substrate 11, thus reducing the cell thickness and manufacturing process.

[0101] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiments 3 and 4, and will not be repeated here.

[0102] [Example 6]

[0103] Figure 20 This is a schematic diagram of the display panel in its initial state according to Embodiment Six of the present invention. Figure 20As shown, the display panel and driving method, and display device provided in Embodiment Six of the present invention are similar to those in Embodiment Four (…). Figures 15 to 18 Example 5 Figure 19 The display panel, driving method, and display device are basically the same as those in the previous embodiment, except that in this embodiment:

[0104] The first touch electrode strip 211, the first spacer electrode strip 212, the second touch electrode strip 221, and the second spacer electrode strip 222 all adopt planar electrodes, meaning that they do not need to use a mesh structure. This increases the electric field strength between the first field-of-view control electrode 111 and the second field-of-view control electrode 121 when they are reused as the first field-of-view control electrode 111. Since the first touch electrode strip 211, the first spacer electrode strip 212, the second touch electrode strip 221, and the second spacer electrode strip 222 all adopt planar electrodes, in order not to affect the light transmittance, they all adopt transparent conductive materials, such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0105] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiments 4 and 5, and will not be repeated here.

[0106] [Example 7]

[0107] Figure 21 This is a schematic diagram of the display panel in its initial state in Embodiment 7 of the present invention. Figure 22 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 7 of the present invention. Figure 21 and Figure 22 As shown, the display panel and driving method, and display device provided in Embodiment 7 of the present invention are similar to those in Embodiment 6. Figure 20 The display panel, driving method, and display device are basically the same as those in the previous embodiment, except that in this embodiment:

[0108] The touch electrode includes a first touch electrode strip 211 and a second touch electrode strip 221 arranged in a cross configuration. The first touch electrode strip 211 and the second touch electrode strip 221 are located on the same layer and are insulated from each other. A bridging electrode (not shown) is provided at the intersection of the first touch electrode strip 211 and the second touch electrode strip 221. The bridging electrode and the second touch electrode strip 221 are located on different layers. Both the first touch electrode strip 211 and the second touch electrode strip 221 are composed of multiple prismatic blocks. The multiple prismatic blocks of the second touch electrode strip 221 are electrically connected to each other, and the multiple prismatic blocks of the first touch electrode strip 211 are connected together through the bridging electrode.

[0109] Those skilled in the art should understand that the remaining structure and working principle of this embodiment are the same as those of Embodiment Six, and will not be repeated here.

[0110] [Example 8]

[0111] Figure 23 This is a schematic diagram of the display panel in its initial state in Embodiment 8 of the present invention. Figure 24 This is a schematic diagram of the planar structure of the touch electrode in Embodiment 8 of the present invention. Figure 23 and Figure 24 As shown, the display panel and driving method, display device provided in Embodiment 8 of the present invention are similar to those in Embodiment 4. Figures 15 to 18 Example 5 Figure 19 Example 6 Figure 20 Example 7 Figure 21 and Figure 22 The display panel, driving method, and display device are basically the same as those in the previous embodiment, except that in this embodiment:

[0112] The touch electrode includes multiple touch electrode blocks 23 and multiple touch traces 24. Each touch electrode block 23 is connected to the touch chip through a corresponding touch trace 24, i.e., self-capacitive touch is used in this embodiment. The touch electrode blocks 23 and touch traces 24 are located on different layers and are separated from each other by an insulating layer. The touch traces 24 are electrically connected to the corresponding touch electrode blocks 23 through contact holes in the insulating layer, so that the touch chip applies touch signals to the corresponding touch electrode blocks 23 through the touch traces 24.

[0113] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiments 4, 5, 6, and 7, and will not be repeated here.

[0114] In this document, the directional terms such as up, down, left, right, front, and back are defined according to the position of the structures in the accompanying drawings and the relative positions of the structures, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein are only used for distinction in name and are not used to limit the number or order.

[0115] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present invention, which are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A display panel, characterized in that, It includes a display liquid crystal cell (30) and a mode switching liquid crystal cell (10) stacked on the light-emitting side of the display liquid crystal cell (30). The display liquid crystal cell (30) is used to control the grayscale display of the image, and the mode switching liquid crystal cell (10) is used to control the switching between 2D display mode and 3D display mode. The mode switching liquid crystal cell (10) includes a first substrate (11), a second substrate (12) disposed opposite to the first substrate (11), and a first liquid crystal layer (13) disposed between the first substrate (11) and the second substrate (12). The first substrate (11) is provided with a first field-of-view control electrode (111) and a touch electrode with touch function. The second substrate (12) is provided with a second field-of-view control electrode (121) cooperating with the first field-of-view control electrode (111) on the side facing the first liquid crystal layer (13). The first substrate (11) is provided with a refractive layer (112) on the side facing the first liquid crystal layer (13). The refractive layer (112) is provided with a plurality of protrusion structures on the side facing the first liquid crystal layer (13). The display liquid crystal cell (30) has alternating first pixel units (P1) and second pixel units (P2), and each of the protrusion structures corresponds to at least one first pixel unit (P1) and one second pixel unit (P2); The touch electrode includes a first touch electrode strip (211) and a second touch electrode strip (221) arranged intersecting each other. The first touch electrode strip (211) and the second touch electrode strip (221) are located in different layers and are insulated from each other. The touch electrode is disposed between the first substrate (11) and the first field-of-view control electrode (111). The first field-of-view control electrode (111) has an opening (111a) corresponding to the touch electrode. The refractive layer (112) is disposed on the side of the first field-of-view control electrode (111) facing the first liquid crystal layer (13), or the first field-of-view control electrode (111) is disposed on the side of the refractive layer (112) facing the first liquid crystal layer (13).

2. The display panel according to claim 1, characterized in that, The touch electrode includes a first spacer electrode strip (212) and a second spacer electrode strip (222) arranged in a cross manner. The first spacer electrode strip (212) is provided between two adjacent first touch electrode strips (211), and the second spacer electrode strip (222) is provided between two adjacent second touch electrode strips (221).

3. The display panel according to any one of claims 1-2, characterized in that, The touch electrode includes a first touch electrode strip (211) and a second touch electrode strip (221) arranged intersecting each other. The first touch electrode strip (211) and the second touch electrode strip (221) are located on the same layer and are insulated from each other. The first touch electrode strip (211) is provided with a bridging electrode at the intersection with the second touch electrode strip (221). The bridging electrode and the second touch electrode strip (221) are located on different layers. Alternatively, the touch electrode includes multiple touch electrode blocks (23) and multiple touch traces (24), and each touch electrode block (23) is connected to the touch chip through the corresponding touch trace (24); Alternatively, the touch electrode may be reused as the first field-of-view control electrode (111).

4. The display panel according to any one of claims 1-2, characterized in that, The first substrate (11) is provided with a wire (113), and a conductive post (14) is provided between the first substrate (11) and the second substrate (12). The conductive post (14) is located in the non-display area at the edge. One end of the conductive post (14) is electrically connected to the second field control electrode (121), and the other end of the conductive post (14) is electrically connected to one end of the wire (113). The other end of the wire (113) extends to the bonding area on the first substrate (11).

5. A driving method for a display panel, characterized in that, The driving method for driving the display panel as described in any one of claims 1-4 includes: In 2D display mode, the refractive index of the first liquid crystal layer (13) is controlled to be equal to the refractive index of the refractive layer (112), and the first pixel unit (P1) and the second pixel unit (P2) on the display liquid crystal cell (30) display the same image; In 3D display mode, the refractive index of the first liquid crystal layer (13) is controlled to be less than the refractive index of the refractive layer (112). The first pixel unit (P1) on the display liquid crystal cell (30) displays a first viewpoint image, and the second pixel unit (P2) displays a second viewpoint image. The first viewpoint image and the second viewpoint image together form a 3D display image.

6. The driving method for a display panel according to claim 5, characterized in that, The driving method includes: In the dual-view display mode, the refractive index of the first liquid crystal layer (13) is controlled to be less than the refractive index of the refractive layer (112). The first pixel unit (P1) on the display liquid crystal cell (30) displays a first viewing angle image, and the second pixel unit (P2) displays a second viewing angle image. The first viewing angle image and the second viewing angle image are different display images. Alternatively, in single-view display mode, the refractive index of the first liquid crystal layer (13) is controlled to be less than the refractive index of the refractive layer (112), the first pixel unit (P1) on the display liquid crystal cell (30) displays a first viewing angle image, and the second pixel unit (P2) is turned off; or, in single-view display mode, the refractive index of the first liquid crystal layer (13) is controlled to be less than the refractive index of the refractive layer (112), the first pixel unit (P1) on the display liquid crystal cell (30) is turned off, and the second pixel unit (P2) displays a second viewing angle image.

7. A display device, characterized in that, Includes the display panel as described in any one of claims 1-4.

Images